import copy

a = [["a", "b", "c"]]

b = a

c = copy.deepcopy(a)

print(id(a), a)
print(id(b), b)
print(id(c), c)

print("----------------")
a[0][1] = "f"

print(id(a), a)
print(id(b), b)
print(id(c), c)
